Point 5. Fuji gets a major fail here - they, for some inexplicable reason, didn't program the EVF/histogram to reflect the actual settings applied. If, for example, you are in a dark dank bar and set your camera to shoot at f/5.6, 1/1000th, and iso200, you'll still see a well-illuminated scene. This is because Fuji decided to ALWAYS show the "proper" exposure in the EVF, no matter what you set. This also goes for the histogram. Making it close to worthless. Sony does the proper thing and adjusts the EVF and histogram for whatever settings (no matter how stupid) you apply.

Studio flash anyone? strobist ? manual flash photo ? I still want to compose my shot. what if i shoot at ISO 200, f/8 and 1/160 in near darkness with a radio transmitter and 2 studio portable flahes ? this means that i cannot see anything before i press the shutter button?

Read more closely - I just said that the Fuji ALWAYS makes the scene bright and visible, independent of your settings (with the exception of exposure compensation, sometimes).

In short, you'll be fine. Perhaps Fuji has a bunch of studio photographers.....